Spa shell



FIG. 1 is a perspective view thereof;

FIG. 2 is a perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a cross-sectional view taken along 4-4 of FIG. 3;

FIG. 5 is a cross-sectional view taken along 5-5 of FIG. 3;

FIG. 6 is a cross-sectional view taken along 6-6 of FIG. 3;

FIG. 7 is a cross-sectional view taken along 7-7 of FIG. 3;

FIG. 8 is a cross-sectional view taken along 8-8 of FIG. 3; and,

FIG. 9 is a cross-sectional view taken along 9-9 of FIG. 3.

The broken-line disclosure in the views represents portions of the article in which the claimed design is embodied, but which form no part of the claimed design. 

CLAIM The ornamental design for a spa shell, as shown and described. 